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 CONFIGURATION

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FFmpeg will try to find the FFmpeg binary when you install the module. 

If it can not find FFmpeg, you will need to specify the path by hand

Go to admin/settings/ffmpeg_wrapper

Make sure you configure the path to FFmpeg. This is relative to the root 

of your server. If don't know where FFmpeg is installed and you have

access to the command line of your server, you can run:

$locate ffmpeg

This should hopefully give you a path to ffmpeg. 

If you need install FFmpeg, there are instructions here for installing 

it on a debian/ubuntu environment:

http://www.24b6.net/?p=188

If you need a compiled binary, check http://24b6.net/content/ffmpeg-binary

If you are having PHP issues with openbasedir, you may want to look

at this page: http://drupal.org/node/82223

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 DEVELOPERS

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ffmpeg_wrapper supports defining configurations that set default values

in forms that are built to support ffmpeg_wrapper. Look in the conf dir

for an example of how these configurations can be built. This is helpful

for constraining users from building configurations that ffmpeg will not

function with.

To enable the support in your forms, merely call this function: 

  ffmpeg_wrapper_enable($prefix, $output_form_id);

Here, $prefix is a prefix used in your forms (in standard drupal, this will

be at least "edit-"). $output_form_id is the name of the output controler

form element. Check out media mover API's mm_ffmpeg module for an example.

The second piece that needs to be done is to name your form elements with

the ffmpeg_wrapper convention. Any form element that controls an aspect

of ffmpeg (eg, audio bit rate) needs to be named in a specific way:

  ffmpeg_audio_ab 

Where ffmpeg is always used, audio is for audio options (video is the other

possibility) and ab is the ffmpeg command for setting the audio bit rate.

Again, mm_ffmpeg offers a good example of how to do this.

Alternatively, you can just use 

$form[] = ffmpeg_wrapper_configuration_form($prefix, $configuration) to

build a form from ffmpeg_wrapper. You will need to handle your own validation

and submission, but outside of handing the size:other options, this is

very easy. Going this route gives you the ajax form configuration straight

away.